Have you ever had a "girl crush"? Straight women seem to be declaring their attractions to other women more often—and some are even leaving their husbands and boyfriends after falling in love with other women.

As O, The Oprah Magazine reports in its April 2009 issue, female sexuality is a little more complicated than previously thought.

One object of many straight women's affections is fitness trainer Jackie Warner, star of the Bravo reality series Work Out. The New York Times has called her a "hot ticket for housewives," and straight women are tuning in to check out the buff lesbian owner of a trendy Beverly Hills gym. Fans are glued to the ups and downs of Jackie's flings and relationships, including a steamy one with a straight trainer named Rebecca.